Patients with untreated sleep apnea were diagnosed with mild cognitive impairment more than a decade earlier than those who slept well or without sleep apnea. http://articles.mercola.com/sites/articles/archive/2015/05/07/sleep-apnea-memory-loss.aspx
A dentist or orthodontist can fit you with a mouthpiece or oral appliance to ease mild sleep apnea. The device is custom made for you and adjusts the position of your lower jaw and tongue. You put it in at bedtime to help keep your airway open while you sleep.